1. A Flight Test Evaluation of The Sinha Wing Performance Enhancing Deturbulators Richard H. Johnson – 1/2/07 Flight Testing Funded by Dallas Glider Association.

2. Figure 1. Three-View Drawing of Standard Cirrus Sailplane Flight Testing Funded by Dallas Glider Association.

3. Figure 2. Airspeed Indicator Instrument Error Flight Testing Funded by Dallas Glider Association.

4. Figure 3. Airspeed System Errors Flight Testing Funded by Dallas Glider Association.

5. Figure 4. Average Sink-Rate Data Flight Testing Funded by Dallas Glider Association.

6. Figure 5. Average L/D Ratios Flight Testing Funded by Dallas Glider Association.

7. Figure 6. Average Sink-Rate Data for Flights 1, 5 & 6 Flight Testing Funded by Dallas Glider Association.

8. Figure 7. Average L/D Ratios for Flights 1, 5 & 6 Flight Testing Funded by Dallas Glider Association.

9. Figure 8. Wing Waviness Flight Testing Funded by Dallas Glider Association.

10. Figure 9. Test pilot Jeff Baird in Std. Cirrus cockpit Flight Testing Funded by Dallas Glider Association.

11. Figure 10. Dick Johnson and Jeff Baird calibrating the airspeed indicator Flight Testing Funded by Dallas Glider Association.

12. Figure 11. Jeff Baird on runway, ready for takeoff Flight Testing Funded by Dallas Glider Association.

13. Figure 12. Dr. Sumon Sinha and Jim Hendrix Flight Testing Funded by Dallas Glider Association.

14. Figure 13. Deturbulator inventor Dr. Sumon Sinha Flight Testing Funded by Dallas Glider Association.

15. Summary The new Sinha Deturbulator could be the first really significant drag-reducing aerodynamic invention since the development of the now-common laminar-flow airfoils that were developed some 65 years ago. Flight Testing Funded by Dallas Glider Association.